Sustained Release C-1000
by NOW · tablet or pill · 180 tablets
- Off the market since July 2016 (NIH)
- UPC 7 33739 00702 5
- DSLD label 50179
- Serving 1 tablet
Sustained Release C-1000 by NOW lists 5 ingredients, 5 with an amount per serving of 1 tablet, such as 1 g of vitamin C, 100 mg of calcium, 250 mg of citrus bioflavonoid complex and 50 mg of acerola powder. Its current label entered the NIH Dietary Supplement Label Database on October 22, 2015.
What is in Sustained Release C-1000?
Each row as the label prints it, per serving of 1 tablet. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Cas Calcium AscorbateVitamin C (Form: from Calcium Ascorbate) Note: 1,000 mg | 1 g | 1,667% | Higher than 91% of 18,583 products listing vitamin C (median 100 mg). |
| Calciumas Calcium AscorbateCalcium (Form: from Calcium Ascorbate) | 100 mg | 10% | 53% of 17,831 products listing calcium give more (median 115 mg). |
| Citrus Bioflavonoid Complex | 250 mg | Higher than 88% of 2,343 products listing flavonoid (median 50 mg). | |
| Acerola powder | 50 mg | 54% of 436 products listing acerola give more (median 60 mg). | |
| Rutin powderas Sophora japonica | 50 mg | Higher than 69% of 1,232 products listing rutin (median 25 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 50179 (entered October 22, 2015), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:
- Its 1,000 mg of vitamin C is higher than 91% of the 18,583 vitamin C products that print an amount; 445 list more.
The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
6 products list the very same ingredients; the nearest amounts come first.
- C-1000 ComplexBiophix same ingredients
- Buffered C-1000 ComplexNOW same ingredients
- C-1000 Buffered CNOW · off the market same ingredients
- C-1000 Buffered C With 250 mg BioflavonoidsNOW · off the market same ingredients
- Sustained Release C-1000 Buffered C With 250 mg BioflavonoidsNOW · off the market same ingredients
- Super CWholeHealth same ingredients
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- Suggested Usage: Take 1 tablet daily.
- Warnings
- Caution: For adults only.
- Consult physician if pregnant/nursing, taking medication, or have a medical condition.
- Keep out of reach of children.
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
- Do Not Eat Freshness Packet. Keep in Bottle.
- Allergens and what it does not contain
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
- Storage
- Store in a cool, dry place after opening.
Source: label statements in DSLD label 50179.
What else is on the label?
Other ingredients: Cellulose, Stearic Acid, Magnesium Stearate, Silica, Vegetarian Coating.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Non-GMO; K; GMP Quality Assured.
How many labels does Sustained Release C-1000 have?
2 labels are on file under this name since September 25, 2015: other sizes, label designs and reformulations. The current one leads this page.
- Label 50179 (current) Entered October 22, 2015 · off the market July 18, 2016 · 180 tablets · UPC 7 33739 00702 5
- Label 50178 Entered September 25, 2015 · off the market July 18, 2016 · 90 tablets · UPC 7 33739 00700 1
DSLD also links this label to: C-1000 Buffered C (package size difference, same product), C-1000 Buffered C (image difference, same product), C-1000 Buffered C (package size difference, same product), C-1000 Buffered C With 250 mg Bioflavonoids (package size difference, same product), C-1000 Buffered C With 250 mg Bioflavonoids (image difference, same product), C-1000 Buffered C With 250 mg Bioflavonoids (package size difference, same product), Sustained Release C-1000 Buffered C With 250 mg Bioflavonoids (package size difference, same product), Sustained Release C-1000 Buffered C With 250 mg Bioflavonoids (image difference, same product).
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names NOW Foods (manufacturer), Bloomingdale, IL. All NOW products.